﻿#region Copyright
// Copyright (c) 2011-2012 RaisingForce Team (Alikin Sergey)
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
#endregion

using System;
using System.Collections.Generic;
using System.Diagnostics.Contracts;
using System.IO;
using System.Linq;
using System.Reflection;
using Aiemp.ObjectModel;
using RaisingForce.Raise.Properties;

namespace RaisingForce.Raise.Hardware
{
    public static class HardwarePluginFinder
    {
        #region Static Methods

        public static IEnumerable<string> EnumeratePlugins(string pattern)
        {
            if (string.IsNullOrWhiteSpace(pattern))
            {
                throw new ArgumentException(
                    Resources.Exception_InvalidPluginPattern,
                    "pattern");
            }
            Contract.Ensures(Contract.Result<IEnumerable<string>>() != null);
            Contract.EndContractBlock();
            string location = Path.GetDirectoryName(
                Assembly.GetExecutingAssembly().Location);
            return Directory.EnumerateFiles(
                location,
                pattern,
                SearchOption.TopDirectoryOnly);
        }

        public static RegistryKey[] RegisterPlugins(
            IEnumerable<string> pluginAssemblies,
            Action<Assembly> pluginAction = null)
        {
            if (pluginAssemblies == null)
            {
                throw new ArgumentNullException("pluginAssemblies");
            }
            Contract.Ensures(Contract.Result<RegistryKey[]>() != null);
            Contract.EndContractBlock();
            return pluginAssemblies
                .SelectMany(filename =>
                    {
                        Assembly assembly = Assembly.LoadFrom(filename);
                        RegistryKey[] keys = RaiseRegistry.Hardware
                            .TryRegisterTypesInAssembly(assembly);
                        if (keys.Length > 0)
                        {
                            if (pluginAction != null)
                            {
                                pluginAction(assembly);
                            }
                        }
                        return keys;
                    })
                .ToArray();
        }

        public static RegistryKey[] RegisterPlugins(
            string pattern,
            Action<Assembly> pluginAction = null)
        {
            if (string.IsNullOrWhiteSpace(pattern))
            {
                throw new ArgumentException(
                    Resources.Exception_InvalidPluginPattern,
                    "pattern");
            }
            Contract.Ensures(Contract.Result<RegistryKey[]>() != null);
            Contract.EndContractBlock();
            IEnumerable<string> pluginAssemblies = EnumeratePlugins(pattern);
            return RegisterPlugins(pluginAssemblies, pluginAction);
        }

        #endregion
    }
}
